解析 1有些固定搭配虽有and连接,但是英语中当做单数看待,比如马(and)车,刀(and)叉,黄油(and)面包等等,但是这个句子中的bulb和screwdriver 并无此用法. 2There be结构遵循“就近原则”,即be的形式根据后面与它最接近的名词形式来确定,在这个句子中a light bulb是个单数形式,所以选is. 翻译就很简单了....
If a light bulb uses 0.5 kilowatt-hours of electricity per day, how many kilowatt-hours does it use in a week? A. 2.5 B. 3.5 C. 4.5 D. 5.5 相关知识点: 试题来源: 解析 B。一天用 0.5 度电,一周 7 天,0.5×7 = 3.5 度电。
Connect one of the electrode wires to the positive terminal on the battery. Connect the second electrode to the threaded side of the light bulb. Secure in place with tape. Use the third piece of wire and connect the negative terminal on the battery to the bottom of the light bulb. Secure...
Before the invention of the light bulb, illuminating the world after the sun went down was a messy, arduous, hazardous task. It took a bunch of candles or torches to fully light up a good-sized room, and oil lamps, while fairly effective, tended to leave a residue of soot on anything...
After you remove the broken light bulb sweep or vacuum up any broken glass and replace the bulb with a new one. Finally, test the new bulb by plugging the light back in and/or turn power back on at the electrical panel. Be sure to recycle the light bulb fragments. ...
A.put it in dustbin B.put it in your pocket C.take it home D.drop it in the street4. The underlined word “contact” in the last paragraph means ___. A.keep up B.go to see C.bring trouble D.get in touch with5. From the speech we can learn that ___ in England. A.your ...
improve/create thelightbulbas we know it today. The first man to ever demonstrate that you can producelightin a controllable wayusingincandescence (heating a filamentusingelectricity) was Ebenezer Kinnersley. He did this in 1761. Humphry Davy used a gigantic battery tolightup a platinum filament ...
How to Open a Light Bulb Without Breaking It: In this instructable I am going to show you how to open a standard incandescent light bulb that can be used for many awesome projects. It all started when I was looking at peoples projects made with opened l
Or which one powers a light bulb for longer, potato battery or lemon battery? If you want to set up an experiment with several trials, pick one thing to change, such as the number of lemons! Don’t change everything! You need to change the independent variable and measure the dependent...
What is a Light Bulb made out of? A bulb is made up of a positive and a negative terminals embedded inside glass, with a tungsten filament that joins the two. When electricity is supplied to the terminals, the flow of electrons heats up the thin filament in between. The electrons continu...